Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Convertible Foreign Currency Held by Federal Reserve Banks," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1966," Federal Reserve Bulletin (May 1966) : 43-43. https://fraser.stlouisfed.org/title/62/item/21377/toc/139137 , accessed on April 18, 2024.